/*! ========================================================================
** Extended Template and Library
** Mutex Abstraction Class Implementation
**
** Copyright (c) 2002 Robert B. Quattlebaum Jr.
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
** General Public License for more details.
**
** === N O T E S ===========================================================
**
** This is an internal header file, included by other ETL headers.
** You should not attempt to use it directly.
**
** ========================================================================= */

#ifndef __ETL__CONDITION_H_
#define __ETL__CONDITION_H_

_ETL_BEGIN_NAMESPACE

class condition : private mutex
{
    bool flag;
public:
    condition()
    {
        flag = false;
    }
    ~condition()
    { }
    void operator()()
    {
        flag = true;
    }
    void wait()
    {
        mutex::lock lock(*this);

        while (!flag) {
            Yield();
        }

        flag = false;
    }
    void wait_next()
    {
        mutex::lock lock(*this);

        flag = false;

        while (!flag) {
            Yield();
        }
    }
};

_ETL_END_NAMESPACE

#endif